Bestand
1960,1-3; 1960,8; 1961,1; 1961,3-4; 1963,1-7; 1964,1-8; 1965,1-8; 1966,1-8; 1967,1-2; 1967,4-6; 1967,8; 1968,1-5; 1968,7-8; 1969,1-6; 1970,2-6; 1971,1-7; 1972,1-5; 1973,1-6; 1974,1-2; 1974,4-5; 1975,1; 1975,5-6; 1976,1-2; 1977,1-2; 1977,4; 1978,1-3; 1979,1-3; 1980,1-3; 1981,1-3; 1982,1-3; 1983,3-4; 1984,1-3; 1985,1-3; 1986,2-3; 1987,1-3; 1988,1-3